Average Co-Inventor Count = 4.50
ph-index = 3
The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.
Company Filing History:
1. Mitsubishi Rayon Company, Limited (3 from 1,357 patents)
2. Seiko Epson Corporation (1 from 33,442 patents)
3 patents:
1. 5247038 - Polybutylene glycol dimethacrylate and resin composition for cast
2. 5183870 - Composition for plastic lenses
3. 4680368 - Ultraviolet curable ink composition